Composite heating and heat preservation system and control method thereof

Abstract

The application discloses a composite heating and heat preservation system and a control method thereof, and belongs to the technical field of heating equipment. The system comprises a waste heat recovery heating module, a steam heating module, a state monitoring module, a heat cycle and auxiliary adjustment module and a control module. The system control method respectively collects flue gas temperature data, cleaning liquid temperature data of each cleaning tank, heat storage medium temperature data, flue gas flow data, heat storage medium flow data, the capacity of the heat storage medium and cleaning line operation state data, calculates flue gas waste heat content and determines whether the cleaning line is stopped, determines to start a steam heating mode or a waste heat heating mode according to the flue gas waste heat content, and closes the steam heating mode or the waste heat heating mode after determining that the cleaning line is stopped. The application recycles the flue gas waste heat generated in the production process for heating and heat preservation of the cleaning liquid on the basis of steam heating, reduces steam consumption for heating the cleaning liquid of the cleaning line, and improves energy source utilization efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to a composite heating and heat preservation system and a control method thereof. BACKGROUND

[0002] Cleaning is an essential link in the manufacturing of hydraulic cylinders. In order to ensure the cleaning effect, the temperature of the cleaning liquid generally needs to be controlled between 50-60 DEG C. Due to large heat consumption, using steam for heating and heat preservation becomes a common way for heating and heat preservation of the cleaning liquid on the cleaning line. With the rise of energy prices, the cost required for purchasing steam also increases year by year, which poses a great challenge to reducing the production cost of products. In the manufacturing process of hydraulic cylinders, a large amount of flue gas is generated, such as coating flue gas, air compressor flue gas and heat treatment flue gas. These flue gases are rich in waste heat and energy, and direct discharge into the atmosphere will cause great energy waste.

[0003] The heating and heat preservation system used in the existing cleaning line for manufacturing hydraulic cylinders mostly uses one of electric heating, steam heating and heat pump heating for heating and heat preservation, so that the waste heat of flue gas is not utilized for composite heating and heat preservation, and there are problems of single heating mode and energy waste.

[0004] Although some technical solutions have been disclosed for utilizing flue gas for composite heating, the control system design has problems in heating mode, applicable occasions, heat distribution and control, system redundancy and the like, including: 1) unable to realize accurate distribution and self-adjustment of heat energy at different heat consumption ends; 2) unable to realize heating for cleaning liquids with different components and cleanliness requirements and ensure that the cleaning liquids do not mix with each other; 3) without considering the problem of how to discharge the rear flue gas, which is easy to cause problems related to environmental protection supervision. Therefore, the existing heating system of the hydraulic cylinder production line still has deficiencies. SUMMARY

[0005] The application aims at overcoming the deficiencies in the prior art, and provides a composite heating and heat preservation system and a control method thereof. Through the method and system, steam and flue gas waste heat are used to cooperatively and comprehensively heat and heat preserve the cleaning line. Specifically, the flue gas waste heat generated in the production process is recovered and used for heating and heat preserving the cleaning liquid on the basis of steam heating, so that the steam consumption for heating and heat preserving the cleaning liquid on the cleaning line is reduced, the energy procurement cost is saved, the energy utilization efficiency is improved, and the carbon emission is indirectly reduced.

[0006] The technical scheme is as follows: in the first aspect, the application provides a composite heating and heat preservation system, which comprises a waste heat recovery heating module, a steam heating module, a state monitoring module, a heat circulation and auxiliary adjustment module and a control module.

[0007] The waste heat recovery heating module is used for heating the flue gas based on the control instruction of the control module, and discharging the flue gas.

[0008] The steam heating module is used for heating the cleaning tank based on the control instruction of the control module.

[0009] The state monitoring module is used for sending the flue gas temperature data, the cleaning liquid temperature data of each cleaning tank, the heat storage medium temperature data, the flue gas flow data, the heat storage medium flow data, the capacity of the heat storage medium, and the running state data of the cleaning line to the control module.

[0010] The heat cycle and auxiliary adjustment module is installed on the multi-section pipeline of the waste heat recovery heating module and the steam heating module, and is used for sending the heat storage medium flow data in the multi-section pipeline and the opening data of the multiple valve ports to the control module, and adjusting the heat storage medium flow and the opening of the multiple valve ports based on the control instruction of the control module, so as to realize the transmission, distribution and adjustment of the heat energy on the multi-section pipeline.

[0011] The control module receives the flue gas temperature data, the cleaning liquid temperature data of each cleaning tank, the heat storage medium temperature data, the flue gas flow data, the heat storage medium flow data, the capacity of the heat storage medium, and the running state data of the cleaning line, generates the control instruction to heat the cleaning line by steam or waste heat, controls each module under the steam heating or waste heat heating, and outputs the fault information, and closes the steam heating mode or the waste heat heating mode after determining that the cleaning line is stopped.

[0012] In a further embodiment, the waste heat recovery heating module comprises: a flue gas generating device, a flue gas three-way valve connected with the flue gas generating device outlet through a flue gas pipeline, a flue gas flow guiding device communicated with the first outlet of the flue gas three-way valve through a flue gas pipeline, a waste heat recovery device connected with the outlet of the flue gas flow guiding device through a flue gas pipeline, a heat energy storage device connected with the heat releasing port of the waste heat recovery device through a pipeline, a sequential heat exchange pipeline having multiple parallel branches connected with the inlet and outlet of the heat energy storage device, a waste heat exchange device respectively installed on the branches of the sequential heat exchange pipeline and in the cleaning tank, a liquid supplement tank connected with the inlet of the heat energy storage device through a pipeline, and a flue gas discharging device communicated with the second outlet of the flue gas three-way valve at one end and communicated with the flue gas discharging port of the waste heat recovery device at the other end, wherein the multiple parallel branches of the sequential heat exchange pipeline respectively pass through the cleaning tank.

[0013] In a further embodiment, the steam heating module comprises: a steam heat transfer device fixedly installed in the cleaning tank; and a steam pipeline communicated with the steam heat transfer device through a pipeline.

[0014] In further embodiments, the state monitoring module comprises: liquid temperature measuring devices respectively installed in the heat storage device and each cleaning tank, a liquid level measuring device installed on the heat storage device, a plurality of liquid flow measuring devices respectively installed between the waste heat recovery device and the first automatic valve, a flue gas flow measuring device and a flue gas temperature measuring device respectively installed on the flue gas pipeline between the flue gas generating device outlet and the flue gas three-way valve;

[0015] The liquid temperature measuring devices are respectively used for detecting the temperature of the cleaning liquid and the heat storage medium;

[0016] The liquid level measuring device is used for measuring the capacity of the heat storage medium in the heat storage device;

[0017] The liquid flow measuring devices are used for measuring the flow of the heat storage medium through the waste heat recovery device in the sequential heat exchange pipeline;

[0018] The flue gas flow measuring device is used for measuring the flue gas flow discharged by the flue gas generating device;

[0019] The flue gas temperature measuring device is used for measuring the temperature of the flue gas discharged by the flue gas generating device.

[0020] In further embodiments, the heat cycle and auxiliary adjustment module comprises: a plurality of first manual valves respectively installed on the connecting pipelines between the waste heat recovery device and the heat storage device, the heat storage device and the waste heat recovery device, and the heat storage device and the liquid supplement tank, a circulating pump respectively installed on the low-temperature connecting pipeline between the heat storage device and the waste heat recovery device and the high-temperature sequential heat exchange pipeline branch between the heat storage device and the waste heat recovery device, a plurality of first automatic valves respectively installed on the sequential heat exchange pipeline branches, a safety valve connected in parallel with the waste heat recovery device through the sequential heat exchange pipeline between the heat storage device and the cleaning tank, a liquid discharge valve installed on the heat storage device, a liquid supplement pump installed on the pipeline between the heat storage device and the liquid supplement tank, and a second manual valve and a second automatic valve respectively installed on the pipeline connecting the steam pipeline and the steam heat transfer device;

[0021] The first manual valves are used for manually controlling the on-off of the waste heat recovery device and the heat storage device and the size of the heat storage medium flow;

[0022] The circulating pump is used for providing power for the heat storage medium flowing between the waste heat recovery device and the heat storage device;

[0023] The number of the first automatic valves is equal to the number of the sequential heat exchange pipeline branches and the cleaning tanks, and the first automatic valves are installed on the sequential heat exchange pipeline branches to control the flow through the waste heat recovery device;

[0024] The safety valve is used for stabilizing the pressure inside the sequential heat exchange pipeline;

[0025] The liquid discharging valve is used for controlling the total amount of the heat storage medium in the thermal energy storage device.

[0026] The liquid supplementing pump is used for supplementing the heat storage medium for the thermal energy storage device.

[0027] The second manual valve is used for manually controlling the on-off of the steam pipeline and each steam heat transfer device and the steam flow control of each steam heat transfer device.

[0028] The second automatic valve is used for automatically controlling the steam flow to each steam heat transfer device.

[0029] The second aspect of the present application provides a composite heating and heat preservation control method based on the composite heating and heat preservation system, comprising:

[0030] Collecting flue gas temperature data, cleaning liquid temperature data of each cleaning tank, heat storage medium temperature data, flue gas flow data, heat storage medium flow data, heat storage medium capacity, and cleaning line operation state data, respectively;

[0031] Calculating the flue gas residual heat content according to the flue gas temperature data and the flue gas flow data, and determining whether the cleaning line is stopped according to the cleaning line operation state data;

[0032] Determining to start the steam heating mode or the residual heat heating mode according to the flue gas residual heat content, and closing the steam heating mode or the residual heat heating mode after determining that the cleaning line is stopped;

[0033] In the steam heating process, the opening size and the operation time of each second automatic valve are controlled according to the cleaning liquid temperature data of each cleaning tank.

[0034] In the residual heat heating process, the liquid supplementing pump, the liquid discharging valve, the linkage opening and closing of the residual heat recovery device and the circulating pump and each first automatic valve, the adjustment of the power of the residual heat recovery device, and the output of fault information are controlled according to the capacity of the heat storage medium, the cleaning liquid temperature data of each cleaning tank, the temperature data of the heat storage medium, and the flow data of the heat storage medium, respectively.

[0035] In a further embodiment, determining to start the steam heating mode or the residual heat heating mode according to the flue gas residual heat content comprises:

[0036] Determining whether the flue gas residual heat content meets a lower limit value of use demand based on a preset flue gas residual heat content;

[0037] If the lower limit value of use demand is not met, starting the steam heating mode and opening the second automatic valve;

[0038] If the lower limit value of use demand is met, starting the residual heat heating mode and starting the flue gas three-way valve and the flue gas diversion device.

[0039] In further embodiments, during the steam heating process, the opening size and operation time of each second automatic valve are controlled according to the cleaning solution temperature data of each cleaning tank, including:

[0040] The cleaning solution temperature data of each cleaning tank is judged based on a preset cleaning solution temperature threshold value. When the cleaning solution temperature data of any cleaning tank is less than the lower limit value of the preset cleaning solution temperature threshold value, the opening of the corresponding pipeline second automatic valve is increased until the cleaning tank cleaning solution temperature data is re-judged after a preset operation time;

[0041] When the cleaning solution temperature data of any cleaning tank is greater than the upper limit value of the preset cleaning solution temperature threshold value, the opening of the corresponding pipeline second automatic valve is reduced until the cleaning tank cleaning solution temperature data is re-judged after a preset operation time;

[0042] When the cleaning solution temperature data of any cleaning tank meets the preset cleaning solution temperature threshold value range, the opening of the corresponding pipeline second automatic valve is kept unchanged until the cleaning tank cleaning solution temperature data is re-judged after a preset operation time.

[0043] In further embodiments, during the residual smoke heating process, the opening and closing of the liquid supplement pump or the opening and closing of the liquid discharge valve or the linkage opening and closing of the heat recovery device and the circulating pump, the adjustment of the power of the heat recovery device, and the output of the fault information are controlled according to the capacity of the heat storage medium, the cleaning solution temperature data of each cleaning tank, the temperature data of the heat storage medium, and the flow data of the heat storage medium, including:

[0044] The capacity of the heat storage medium is judged based on a preset capacity threshold value of the heat storage medium, and the liquid supplement pump is started or the liquid discharge valve is started or the heat recovery device and the circulating pump are linked to open and close according to the judged capacity of the heat storage medium;

[0045] The cleaning solution temperature data of each cleaning tank is judged based on a preset cleaning solution temperature threshold value, the opening and closing of each first automatic valve is determined, and the flow data of the heat storage medium in the circulating heat exchange pipeline branch where each first automatic valve is located is monitored. Based on the flow data of the heat storage medium, the output fault information is judged in real time;

[0046] The temperature of the heat storage medium is judged based on a preset heat storage medium temperature threshold value, the power of the heat recovery device is adjusted according to the judged temperature of the heat storage medium, and the adjusted power of the heat recovery device is monitored. Based on the power of the heat recovery device, the output fault information is judged in real time.

[0047] In further embodiments, the capacity of the heat storage medium is judged based on a preset capacity threshold value of the heat storage medium, and the liquid supplement pump is started or the liquid discharge valve is started or the heat recovery device and the circulating pump are linked to open and close according to the judged capacity of the heat storage medium, including:

[0048] when the capacity of the heat storage medium is greater than the upper limit of the preset capacity threshold of the heat storage medium, the liquid discharge valve is opened for discharging liquid to the heat storage device, and when the capacity of the heat storage medium is equal to the average value of the preset capacity threshold of the heat storage medium, the liquid discharge valve is closed;

[0049] when the capacity of the heat storage medium is greater than the upper limit of the preset capacity threshold of the heat storage medium, the liquid discharge valve is opened for discharging liquid to the heat storage device, and when the capacity of the heat storage medium is equal to the average value of the preset capacity threshold of the heat storage medium, the liquid discharge valve is closed;

[0050] when the capacity of the heat storage medium is greater than the upper limit of the preset capacity threshold of the heat storage medium, the liquid discharge valve is opened for discharging liquid to the heat storage device, and when the capacity of the heat storage medium is equal to the average value of the preset capacity threshold of the heat storage medium, the liquid discharge valve is closed;

[0051] In further embodiments, the temperature of the heat storage medium is determined based on a preset heat storage medium temperature threshold, the power of the waste heat recovery device is adjusted according to the determined temperature of the heat storage medium, and the adjusted power of the waste heat recovery device is monitored. Based on the power of the waste heat recovery device, real-time fault information is output, including:

[0052] If any cleaning tank cleaning liquid temperature data is less than the lower limit of the preset cleaning liquid temperature threshold, the opening area of the first automatic valve in the cleaning tank is increased, and during the opening of the first automatic valve, based on the preset opening threshold and system settings, the first automatic valve corresponding to a portion of the cleaning tanks is closed, and the steam heating mode is switched to or the fault information is output based on the heat storage medium flow data. If the valve opening of the first automatic valve has reached the upper limit, the corresponding first automatic valve of a portion of the cleaning tanks is closed according to the setting, and the steam heating mode is switched to;

[0053] If the valve opening of the first automatic valve has not reached the upper limit, the corresponding pipeline flow is detected and the heat storage medium flow data is determined. In the case where the flow does not increase, the fault information is output, and in the case where the flow increases, the temperature of the cleaning liquid is re-determined after a predetermined running time;

[0054] If any cleaning tank cleaning liquid temperature data is greater than the upper limit of the preset cleaning liquid temperature threshold, the opening area of the first automatic valve in the cleaning tank is decreased, and during the opening of the first automatic valve, the fault information is output based on the heat storage medium flow data; and after the opening of the first automatic valve is reduced to closed and maintained for a predetermined time, the temperature of the heat storage medium is determined.

[0055] In further embodiments, the temperature of the heat storage medium is determined based on a preset heat storage medium temperature threshold, the power of the waste heat recovery device is adjusted according to the determined temperature of the heat storage medium, and the adjusted power of the waste heat recovery device is monitored. Based on the power of the waste heat recovery device, real-time fault information is output, including:

[0056] If the temperature of the heat storage medium is less than the lower limit of the preset heat storage medium temperature threshold, the operating power of the waste heat recovery device is increased, and fault information is output based on the real-time state of the power; wherein, when the power is increased to the upper limit, an automatic alarm and system prompt for manual intervention to adjust the operation of the whole heating system are given;

[0057] When the power is not increased to the upper limit, the power is judged in real time, if the power is increased, the temperature of the heat storage medium is re-judged after a preset operating time, and if the power is not increased, fault information is output;

[0058] If the temperature of the heat storage medium is greater than the upper limit of the preset heat storage medium temperature threshold, the operating power of the waste heat recovery device is reduced, and fault information is output based on the real-time state of the power; wherein, if the waste heat recovery device is reduced to shutdown, it is judged whether the cleaning line is stopped; if the waste heat recovery device is not stopped, the power is judged in real time, if the power is reduced, the temperature of the heat storage medium is re-judged after a preset operating time, and if the power is not reduced, fault information is output.

[0059] Advantages: compared with the prior art, the present application has the following advantages:

[0060] (1) The control module controls the waste heat recovery heating module and the steam heating module in cooperation through the cleaning line operation data, the waste heat of the flue gas generated in the production process is recovered for heating and heat preservation of the cleaning liquid on the basis of steam heating, comprehensive heating and heat preservation of each cleaning liquid in the cleaning line are realized by using steam and waste heat of flue gas, the steam consumption for heating the cleaning liquid of the cleaning line is reduced, the energy procurement cost is saved, the energy utilization efficiency is improved, and the carbon emission is indirectly reduced;

[0061] (2) The system collects various operation data such as flue gas temperature data, cleaning liquid temperature data of each cleaning tank, heat storage medium temperature data, flue gas flow data, heat storage medium flow data, capacity of heat storage medium, cleaning line operation state data and other operation data as system variables and judges in real time, controls the real-time progress of the two heating modes in all directions and accurately according to various operation data, and improves the stability and redundancy of system operation;

[0062] (3) The design can also make the cleaning line suitable for cleaning liquids with different temperatures, different components and different cleanliness requirements by judging the cleaning liquid temperature data of each cleaning tank, simplify the complexity of equipment use and improve the compatibility of equipment to cleaning liquids, and realize accurate distribution of heat energy between different cleaning tanks by real-time monitoring and control adjustment of the opening and closing of the corresponding valves;

[0063] (4) Through the connection of the waste heat recovery device with the flue gas discharge device and the heat storage device, unified discharge and treatment of the flue gas after waste heat recovery are realized, and environmental problems caused by random discharge and leakage are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 is a structural block diagram of the composite heating and heat preservation system of the present application;

[0065] Figure 2 is a control flow chart of the composite heating and heat preservation system of the present application.

[0066] Figure 3 is a running state adjustment flow chart of the steam heating module of the composite heating system of the present application.

[0067] Figure 4 is a running state adjustment flow chart of the waste heat heating module of the composite heating system of the present application.

[0068] Reference signs: 1.1 flue gas generating device, 1.2 flue gas three-way valve, 1.3 flue gas flow guiding device, 1.4 waste heat recovery device, 1.5 flue gas discharging device, 1.6 heat energy storage device, 1.7 waste heat heat exchange device, 1.8 liquid supplementing tank, 2.1 steam pipeline, 2.2 steam heat transfer device, 3.1 liquid temperature measuring device, 3.2 liquid level measuring device, 3.3 liquid flow measuring device, 3.4 flue gas flow measuring device, 3.5 flue gas temperature measuring device, 4.1 first manual valve, 4.2 circulating pump, 4.3 first automatic valve, 4.4 safety valve, 4.5 liquid discharging valve, 4.6 liquid supplementing pump, 4.7 second manual valve, 4.8 second automatic valve, 5 control cabinet, 6 cleaning tank. DETAILED DESCRIPTION

[0069] In order to more fully understand the technical content of the present application, the technical solutions of the present application are further introduced and explained below in combination with specific embodiments, but are not limited thereto.

[0070] As shown in the composite heating and heat preservation system shown in the accompanying drawings, the composite heating and heat preservation system comprises a waste heat recovery heating module, a steam heating module, a state monitoring module, a heat circulation and auxiliary adjustment module, and a control module. Figure 1 The heat preservation system acts on a cleaning line in a production workshop, and a plurality of cleaning tanks 6 are arranged on the cleaning line, and cleaning liquid is contained in the cleaning tanks 6. The cleaning liquid in the cleaning tanks 6 is heated and preserved by the waste heat recovery heating module and the steam heating module in the composite heating and heat preservation system, so as to ensure the cleaning effect.

[0071] The waste heat recovery heating module comprises a flue gas generating device 1.1, a flue gas three-way valve 1.2, a flue gas flow guiding device 1.3, a waste heat recovery device 1.4, a flue gas discharging device 1.5, a heat energy storage device 1.6, a waste heat heat exchange device 1.7, and a liquid supplementing tank 1.8.

[0072] The steam heating module comprises a steam pipeline 2.1 and a steam heat transfer device 2.2.

[0073] The status monitoring module includes: liquid temperature measuring device 3.1, liquid level measuring device 3.2, liquid flow measuring device 3.3, flue gas flow measuring device 3.4, and flue gas temperature measuring device 3.5;

[0074] The thermal circulation and auxiliary adjustment module includes: a first manual valve 4.1, a circulation pump 4.2, a first automatic valve 4.3, a safety valve 4.4, a drain valve 4.5, a replenishment pump 4.6, a second manual valve 4.7, and a second automatic valve 4.8.

[0075] The control module includes: control cabinet 5 and the processing unit set in control cabinet 5. The processing unit is electrically connected or communicates with the waste heat recovery heating module, steam heating module, status monitoring module, and heat circulation and auxiliary adjustment module via wired or wireless means, respectively. Specifically, it is connected to the flue gas three-way valve 1.2, flue gas diversion device 1.3, waste heat recovery device 1.4, liquid temperature measuring device 3.1, liquid level measuring device 3.2, liquid flow measuring device 3.3, flue gas flow measuring device 3.4, flue gas temperature measuring device 3.5, circulation pump 4.2, first automatic valve 4.3, liquid discharge valve 4.5, liquid replenishment pump 4.6, and second automatic valve 4.8 via communication cables or wireless communication protocols.

[0076] The control module receives data from the waste heat recovery heating module, steam heating module, status monitoring module, heat circulation and auxiliary adjustment module, generates control commands to perform steam heating or waste heat heating on the cleaning line, adjusts each module under steam heating or waste heat heating and outputs fault information, and shuts down the steam heating mode or waste heat heating mode after determining that the cleaning line is shut down.

[0077] The waste heat recovery heating module heats the cleaning tank 6 with waste heat from the flue gas based on the control instructions of the control module. This heat is used to supply heat to the cleaning liquid in multiple cleaning tanks 6 and to discharge the flue gas.

[0078] The steam heating module heats the cleaning tank 6 with steam based on the control command of the control module, so as to supply steam heat to the cleaning liquid in multiple cleaning tanks 6.

[0079] The status monitoring module is installed in the waste heat recovery heating module and the steam heating module to send various operating data of the waste heat recovery heating module and the steam heating module to the control module;

[0080] The heat circulation and auxiliary adjustment module is installed on multiple pipelines of the waste heat recovery heating module and the steam heating module. It is used to send the flow dynamic data of the heat storage medium in the multiple pipelines and the opening data of multiple valve ports to the control module. Based on the control commands of the control module, it adjusts the flow dynamic data of the heat storage medium and the opening size of the valve ports to realize the transmission, distribution and adjustment of heat energy in the multiple pipelines.

[0081] Preferably, in the waste heat recovery heating module, the flue gas generating device 1.1 is connected to the waste heat recovery device 1.4 and the flue gas emission device 1.5 via a flue gas pipe. A flue gas three-way valve 1.2 is installed at the junction of the flue gas pipe connecting the flue gas generating device 1.1, the waste heat recovery device 1.4, and the flue gas emission device 1.5. The flue gas diversion device 1.3 is connected to the first outlet of the flue gas three-way valve 1.2 via a flue gas pipe. The heat energy storage device 1.6 is connected to the heat release port of the waste heat recovery device 1.4 via a pipeline. The sequential heat exchange pipeline is connected to the inlet and outlet of the heat energy storage device 1.6. The cleaning tank 6 is connected to the inlet and has multiple parallel sequential heat exchange pipeline branches. The multiple sequential heat exchange pipeline branches pass through the cleaning tank 6 and are fixedly installed in the cleaning tank 6. The number of waste heat exchange devices 1.7 is equal to that of the cleaning tank 6. Several waste heat exchange devices 1.7 are connected to the sequential heat exchange pipeline branches and installed in the cleaning tank 6. The replenishment tank 1.8 is connected to the inlet of the heat energy storage device 1.6 through a pipeline. One end of the flue gas emission device 1.5 is connected to the second outlet of the flue gas three-way valve 1.2, and the other end of the flue gas emission device 1.5 is connected to the exhaust port of the waste heat recovery device 1.4.

[0082] Preferably, the steam heat transfer device 2.2 in the steam heating module is fixedly installed in the cleaning tank 6, and the steam pipe 2.1 is connected to the steam heat transfer device 2.2 through a pipeline.

[0083] Preferably, the status monitoring module contains multiple liquid temperature measuring devices 3.1, which are respectively installed in the thermal energy storage device 1.6 and each cleaning tank 6. The liquid level measuring device 3.2 is installed on the thermal energy storage device 1.6. The liquid flow measuring device 3.3 is respectively installed on the circulating heat exchange pipeline branch between each waste heat exchange device 1.7 and the first automatic valve 4.3. The flue gas flow measuring device 3.4 and the flue gas temperature measuring device 3.5 are respectively installed on the flue gas pipeline from the outlet of the flue gas generating device 1.1 to the flue gas three-way valve 1.2.

[0084] Liquid temperature measuring device 3.1 is used to detect the temperature of cleaning fluid and heat storage medium respectively;

[0085] The liquid level measuring device 3.2 is used to measure the capacity of the heat storage medium in the thermal energy storage device 1.6;

[0086] Liquid flow measurement device 3.3 is used to measure the flow rate of the heat storage medium flowing through the waste heat exchange device 1.7 in the sequential heat exchange pipeline;

[0087] The flue gas flow measuring device 3.4 is used to measure the flow rate of the flue gas discharged from the flue gas generating device 1.1;

[0088] The flue gas temperature measuring device 3.5 is used to measure the temperature of the flue gas discharged from the flue gas generating device 1.1.

[0089] Preferably, the heat circulation and auxiliary adjustment module has multiple first manual valves 4.1, which are respectively installed on the connecting pipelines between the waste heat recovery device 1.4 and the heat energy storage device 1.6, between the heat energy storage device 1.6 and the waste heat exchanger 1.7, and between the heat energy storage device 1.6 and the replenishment tank 1.8. The module also has multiple circulation pumps 4.2, which are respectively installed on the low-temperature connecting pipelines between the heat energy storage device 1.6 and the waste heat recovery device 1.4, and on the pipelines between the heat energy storage device 1.6 and the waste heat exchanger 1.7. On the high-temperature sequential heat exchange pipeline branch between the heat devices 1.7, multiple first automatic valves 4.3 are respectively installed on the sequential heat exchange pipeline branch. Safety valve 4.4 is connected in parallel with waste heat exchange device 1.7 through the sequential heat exchange pipeline between heat energy storage device 1.6 and cleaning tank 6. Drain valve 4.5 is installed on heat energy storage device 1.6. Replenishment pump 4.6 is installed on the pipeline from heat energy storage device 1.6 to replenishment pipeline. Second manual valve 4.7 and second automatic valve 4.8 are respectively installed on the pipeline connecting steam pipeline 2.1 and steam heat transfer device 2.2.

[0090] The first manual valve 4.1 is used to manually control the on / off state of the waste heat recovery device 1.4 and the thermal energy storage device 1.6, as well as the flow rate of the heat storage medium.

[0091] The circulating pump 4.2 is used to provide power for the heat storage medium flowing between the waste heat recovery device 1.4 and the thermal energy storage device 1.6, driving the heat storage medium to flow in the pipeline;

[0092] The number of first automatic valves 4.3 is equal to the number of sequential heat exchange pipeline branches and cleaning tanks 6, and they are installed on the sequential heat exchange pipeline branches to control and adjust the flow rate through the sequential heat exchange pipeline branch where the waste heat exchange device 1.7 is located.

[0093] Safety valve 4.4 is used to stabilize the pressure inside the sequential heat exchange pipeline to prevent pipeline rupture caused by excessive pressure.

[0094] The drain valve 4.5 is used to drain the heat storage medium in the heat energy storage device 1.6 and control the total amount of heat storage medium in the heat energy storage device 1.6;

[0095] The replenishment pump 4.6 is used to replenish the heat storage medium for the thermal energy storage device 1.6;

[0096] The second manual valve 4.7 is used to manually control the opening and closing of the steam pipeline 2.1 and each steam heat transfer device 2.2, as well as the steam flow control of each steam heat transfer device 2.2;

[0097] The second automatic valve 4.8 is used to automatically control the steam flow to each steam heat transfer device 2.2.

[0098] Preferably, the temperature control limit of the heat storage medium is higher than the operating temperature limit of the cleaning solution for all different grass species. In this embodiment, the preset temperature limit of the cleaning solution and the temperature control limit of the heat storage medium in the i-th cleaning tank 6 are as follows:

[0099] T1i represents the lower limit of the temperature control of the cleaning fluid in the i-th cleaning tank 6 when the waste heat system is heating;

[0100] T2i represents the upper limit of the temperature control of the cleaning fluid in the i-th cleaning tank 6 when the waste heat system is heating;

[0101] Tx1 represents the lower limit of the temperature control of the heat storage medium in thermal energy storage device 1.6, Tx1 = T2imax + 10;

[0102] Tx2 represents the upper limit of the temperature control of the heat storage medium in thermal energy storage device 1.6, Tx2 = T2imax + 15.

[0103] Example 2:

[0104] Combination Figures 2 to 4 Further explanation of a composite heating and insulation control method in this embodiment, based on the above-mentioned composite heating and insulation system, includes:

[0105] S1: Collect flue gas temperature data, cleaning fluid temperature data of each cleaning tank 6, heat storage medium temperature data, flue gas flow rate data, heat storage medium flow rate data, heat storage medium capacity, and cleaning line operation status data respectively.

[0106] S2: Calculate the waste heat content of the flue gas based on the flue gas temperature data and flue gas flow data, and determine whether the cleaning line should be shut down based on the cleaning line operation status data;

[0107] S2.1: Determine whether the waste heat content of the flue gas meets the lower limit of the usage requirements based on the preset waste heat content of the flue gas;

[0108] S2.2: If the lower limit of the usage requirement is not met, start the steam heating mode and open the second automatic valve 4.8 to turn to S3.1;

[0109] S2.3: If the lower limit of the usage requirement is met, start the waste heat heating mode and start the flue gas three-way valve 1.2 and flue gas diversion device 1.3 to switch to S3.2.

[0110] In any step from S2.1 to S2.3, the cleaning line is judged in real time based on the operating status data of the cleaning line until the cleaning line is stopped and the process proceeds to S3.

[0111] S3: Determine whether to start the steam heating mode or the waste heat heating mode based on the waste heat content of the flue gas; and turn off the steam heating mode or the waste heat heating mode after determining that the cleaning line is shut down.

[0112] S3.1: During the steam heating process, the opening size and running time of each second automatic valve 4.8 are controlled according to the cleaning liquid temperature data of each cleaning tank 6.

[0113] S3.1.1: Based on the preset cleaning fluid temperature threshold, the cleaning fluid temperature data of each cleaning tank 6 is judged. When the cleaning fluid temperature data of any cleaning tank 6 is less than the lower limit of the preset cleaning fluid temperature threshold, the opening of the second automatic valve 4.8 in the corresponding pipeline is increased until the preset running time is continued and the cleaning fluid temperature data of the cleaning tank 6 is judged again.

[0114] S3.1.2: When the cleaning fluid temperature data of any cleaning tank 6 is greater than the preset upper limit of the cleaning fluid temperature threshold, reduce the opening of the second automatic valve 4.8 in the corresponding pipeline until the continuous running time t4, and then re-evaluate the cleaning fluid temperature data of the cleaning tank 6.

[0115] S3.1.3: When the cleaning fluid temperature data of any cleaning tank 6 meets the preset cleaning fluid temperature threshold range, keep the opening of the second automatic valve 4.8 of the corresponding pipeline unchanged until the continuous running time t4, and then re-evaluate the cleaning fluid temperature data of the cleaning tank 6.

[0116] In any of steps S3.1.1 to S3.1.3, determine that the steam heating mode is turned off after the cleaning line is shut down;

[0117] S3.2: During the residual smoke heating process, based on the capacity of the heat storage medium, the temperature data of the cleaning liquid in each cleaning tank 6, the temperature data of the heat storage medium, and the flow rate data of the heat storage medium, the system controls the opening and closing of the replenishment pump 4.6 or the opening and closing of the discharge valve 4.5, or the linkage opening and closing of the waste heat recovery device 1.4 with the circulation pump 4.2 and each first automatic valve 4.3, or adjusts the power of the waste heat recovery device 1.4 and outputs fault information.

[0118] S3.2.1: Determine the capacity of the heat storage medium based on the preset capacity threshold of the heat storage medium, and control the start of the replenishment pump 4.6 or the start of the discharge valve 4.5 or the linkage between the waste heat recovery device 1.4 and the circulation pump 4.2 according to the determined capacity of the heat storage medium;

[0119] S3.2.1.1: When the capacity of the heat storage medium is less than the lower limit of the preset capacity threshold of the heat storage medium, the replenishment pump 4.6 is turned on to replenish the heat energy storage device 1.6; and when the capacity of the heat storage medium is equal to the average value of the preset capacity threshold of the heat storage medium, the replenishment pump 4.6 is turned off.

[0120] S3.2.1.2: When the capacity of the heat storage medium is greater than the upper limit of the preset capacity threshold of the heat storage medium, the drain valve 4.5 is opened to drain the heat storage device 1.6, and the drain valve 4.5 is closed when the capacity of the heat storage medium is equal to the average value of the preset capacity threshold of the heat storage medium.

[0121] S3.2.1.3: When the capacity of the heat storage medium is greater than or equal to the lower limit of the preset capacity threshold and less than or equal to the upper limit of the capacity threshold, the waste heat recovery device 1.4 and the circulation pump 4.2 are turned on, and each of the first automatic valves 4.3 is adjusted to the preset opening and continues to run for the preset time.

[0122] S3.2.2: Based on the preset cleaning fluid temperature threshold, determine the cleaning fluid temperature data of each cleaning tank 6, determine the opening and closing of each first automatic valve 4.3; and monitor the heat storage medium flow data in the circulating heat exchange pipeline branch where each first automatic valve 4.3 is located, and based on the heat storage medium flow data, determine and output fault information in real time to prompt the staff.

[0123] S3.2.2.1: If the temperature data of the cleaning fluid in any cleaning tank 6 is detected to be lower than the lower limit of the preset cleaning fluid temperature threshold, the opening area of ​​the first automatic valve 4.3 located in the cleaning tank 6 is increased. During the process of increasing the opening of the first automatic valve 4.3, based on the preset opening threshold and system settings, it is determined to close the first automatic valve 4.3 corresponding to a portion of the cleaning tanks 6 and switch to steam heating mode or output fault information based on the heat storage medium flow data.

[0124] During the process of increasing the opening of the first automatic valve 4.3, based on the preset opening threshold, it is determined to close the first automatic valve 4.3 corresponding to other cleaning tanks 6. Specifically, if any cleaning tank 6 is the i-th cleaning tank 6, and the valve opening of the i-th first automatic valve 4.3 has reached the upper limit, then the first automatic valve 4.3 corresponding to a portion of the cleaning tanks 6 is closed according to the setting, and the system switches to steam heating mode S3.1. The system is set to automatically close the first automatic valve 4.3 corresponding to a portion of the cleaning tanks 6 during the waste heat heating process and switch to steam heating. The purpose of this design is to address the situation where the cleaning liquid temperature of multiple cleaning tanks 6 cannot reach the set threshold requirement during the waste heat heating process. This reflects that the heat generation capacity of waste heat heating for all cleaning liquids 6 is insufficient under this condition, and can only meet the heat preservation needs of some cleaning tanks 6, not all cleaning tanks 6. Therefore, the system is set to realize that the heat preservation system has the function of co-operating waste heat heating and steam heating. The two heating methods work together under this condition, which can make full use of the waste heat of flue gas for heating, reduce steam consumption, and achieve a high degree of automation, reducing the number of manual controls and reducing costs.

[0125] If the valve opening of the i-th first automatic valve 4.3 does not reach the upper limit, the flow rate of the corresponding pipeline is detected and judged based on the flow rate data of the heat storage medium. If the flow rate does not increase, a fault information is output. If the flow rate increases, the temperature of the cleaning fluid is re-judged after maintaining the preset running time.

[0126] S3.2.2.2: If the temperature data of the cleaning fluid in any cleaning tank is detected to be greater than the upper limit of the preset cleaning fluid temperature threshold, the opening area of ​​the first automatic valve 4.3 located in the cleaning tank is reduced, and fault information is output based on the heat storage medium flow rate data during the process of reducing the opening of the first automatic valve 4.3; and after the opening of the first automatic valve 4.3 is reduced to closed and maintained for a preset time, the temperature of the heat storage medium is determined and the process proceeds to S3.2.3; wherein, if the opening of the first automatic valve 4.3 is not closed, the heat storage medium flow rate data of the corresponding pipeline is detected, and fault information is output if the heat storage medium flow rate is not reduced, and the temperature of the cleaning fluid is re-determined after maintaining the preset running time if the heat storage medium flow rate is reduced.

[0127] S3.2.3: Determine the temperature of the heat storage medium based on the preset temperature threshold of the heat storage medium, adjust the power of the waste heat recovery device 1.4 according to the determined temperature of the heat storage medium, monitor the adjusted power of the waste heat recovery device 1.4, and output fault information in real time based on the power of the waste heat recovery device 1.4.

[0128] S3.2.3.1: If the temperature of the heat storage medium is lower than the preset lower limit of the heat storage medium temperature threshold, the operating power of the waste heat recovery device 1.4 will be increased; and the output fault information will be determined based on the real-time power status; wherein, if the power is increased to the upper limit, an automatic alarm will be triggered and the system will prompt manual intervention to adjust the operation of the entire heating system;

[0129] S3.2.3.2: If the power increase does not reach the upper limit, the power is judged in real time. If the power increases, the temperature of the heat storage medium is re-judged after the preset running time is maintained; if the power does not increase, a fault information is output.

[0130] S3.2.3.3: If the temperature of the heat storage medium is greater than the upper limit of the preset heat storage medium temperature threshold, the operating power of the waste heat recovery device 1.4 is reduced, and the output fault information is determined based on the real-time power status; wherein, if the waste heat recovery device 1.4 is reduced to shutdown, it is determined whether the cleaning line is shut down; if the waste heat recovery device 1.4 is not shut down, the power is judged in real time, if the power decreases, the preset operating time is maintained and the heat storage medium temperature is re-judged, if the power does not decrease, the fault information is output.

[0131] In any step from S3.2.1 to S3.2.3, determine that the residual heat heating mode is turned off after the cleaning line is shut down; if the cleaning line is not shut down, repeat the temperature judgment S3.2.2 of the cleaning liquid in each cleaning tank 6 within the preset operating time interval of the residual heat heating mode.

[0132] Example 3

[0133] To illustrate the control method of this application according to actual application conditions, the control sequence of each module is shown, and the content of scheduling the coordinated operation of various modules is described in detail. In the following process, various preset values ​​and preset thresholds are compiled into different symbols, and the meanings of various preset values ​​and preset thresholds are as follows:

[0134] Tci represents the preset temperature of the cleaning solution in the i-th cleaning tank 6;

[0135] T1i' represents the lower limit of the temperature control of the cleaning fluid in the i-th cleaning tank 6 when the steam system is heated;

[0136] T2i' represents the upper limit of the temperature control of the cleaning fluid in the i-th cleaning tank 6 when the steam system is heated;

[0137] T1i represents the lower limit of the temperature control of the cleaning fluid in the i-th cleaning tank 6 when the waste heat system is heating;

[0138] T2i represents the upper limit of the temperature control of the cleaning fluid in the i-th cleaning tank 6 when the waste heat system is heating;

[0139] Tx1 represents the lower limit of the temperature control of the heat storage medium in thermal energy storage device 1.6, Tx1 = T2imax + 10;

[0140] Tx2 represents the upper limit of the temperature control of the heat storage medium in thermal energy storage device 1.6, Tx2 = T2imax + 15;

[0141] Vx represents the lower limit of the capacity of the heat storage medium inside the thermal energy storage devices 1 and 6;

[0142] Vs represents the upper limit of the capacity of the heat storage medium inside the thermal energy storage devices 1 and 6;

[0143] Furthermore, the implementation steps of the composite heating and insulation system control method are as follows:

[0144] S1: Detects the flow rate S and temperature T of the exhaust gas from the flue gas generating device 1.1.

[0145] S2: Determine the waste heat content Q of the flue gas. If Q does not meet the minimum usage requirements, proceed to step S3; if Q meets the minimum usage requirements, proceed to step S4.

[0146] The formula for calculating the waste heat content of flue gas is as follows:

[0147] Q=1328×L×S×(T-20)×C×η;

[0148] In the formula, S represents the flow rate of the flue gas, T represents the temperature of the flue gas, Q represents the heat content of the flue gas, C represents the heat recovery coefficient, and η represents the system heat transfer efficiency.

[0149] S3: Start the steam heating module of cleaning tank 6 and open the automatic steam valve 4.8.

[0150] S31: Keep the steam heating parameters unchanged and continuously operate for a time t3.

[0151] S32: Measure the temperature Tci of the cleaning liquid in each cleaning tank 6 and determine Tci. If the temperature Tci of the cleaning liquid in the cleaning tank 6 < T1i', go to step S321; if the temperature Tci of the cleaning liquid in the cleaning tank 6 > T2i', go to step S322; if the temperature Tci of the cleaning liquid in the cleaning tank 6 satisfies T1i' ≤ Tci ≤ T2i', go to step S323.

[0152] S321: Increase the opening of the steam automatic valve 4.8 of the corresponding pipeline. After continuously operating for a time t4, repeat step S32.

[0153] S322: Decrease the opening of the steam automatic valve 4.8 of the corresponding pipeline. After continuously operating for a time t4, repeat step S32.

[0154] S323: Keep the state of the steam heating system unchanged and go to step S33.

[0155] S33: Determine whether the cleaning line is stopped. If it is stopped, close the steam heating module; if it is not stopped, go to step S31.

[0156] S4: Start the waste heat heating module and start the flue gas three-way valve 1.2 and the flue gas diversion device 1.3.

[0157] S41: Detect the liquid volume V of the heat storage medium inside the heat energy storage device 1.6. If V < Vx, go to step S411; if V > Vs, go to step S412; if Vx ≤ V ≤ Vs, go to step S42.

[0158] S411: Open the liquid filling pump 4.6 for liquid filling. When V = (Vx + Vs) / 2, close the liquid filling pump 4.6 and go to step S42.

[0159] S412: Open the drain valve 4.5 for draining. When V = (Vx + Vs) / 2, close the drain valve 4.5 and go to step S42.

[0160] S42: Start the waste heat recovery device 1.4 and the circulation pump 4.2, open the valve ports of each automatic valve 4.3 in the pipeline to the specified size and continuously operate in this state for a time t0.

[0161] S43: Measure the temperature Tci of the cleaning liquid in each cleaning tank 6 and judge the temperature Tci of the cleaning liquid. If Tci < T1i, go to step S431; if Tci > T2i, go to step S432; if Tc satisfies T1i ≤ Tci ≤ T2i, go to step S433.

[0162] S431: Increase the opening of the automatic valve 4.3 of the waste heat exchange pipeline of the i-th cleaning tank 6. If the valve opening has reached the upper limit, close the automatic valves 4.3 of some of the waste heat heating system pipelines of the cleaning tanks 6 according to the preset conditions, and go to step S3. If the valve opening has not reached the upper limit, detect the flow rate of the corresponding pipeline, and determine whether the flow rate increases. If the flow rate does not increase, give a fault alarm. If the flow rate increases, after running for a time t1, repeat step S43.

[0163] S432: Decrease the opening of the automatic valve 4.3 of the waste heat exchange pipeline of the i-th cleaning tank 6. If the valve has been closed, after running for a time t1, repeat step S43. If the valve has not been closed, detect the flow rate of the corresponding pipeline, and determine whether the flow rate decreases. If the flow rate does not decrease, give a fault alarm. If the flow rate decreases, after running for a time t1, repeat step S43.

[0164] S433: Keep the valve opening size of the automatic valve 4.3 unchanged, and go to step S44.

[0165] S44: Measure the temperature Tx of the heat storage medium stored in the heat energy storage device 1.6, and make a temperature judgment. If Tx < Tx1, go to step S441; if Tx > Tx2, go to step S442; if Tx satisfies Tx1 ≤ Tx ≤ Tx2, keep the operating state of the waste heat recovery device 1.4 unit unchanged, and go to step S45.

[0166] S441: Increase the operating power of the waste heat recovery device 1.4. If the power of the waste heat recovery device 1.4 has reached the upper limit requirement, the system gives an alarm prompt, and manual intervention is required to adjust the operation of the entire heating system. If the power of the waste heat recovery device 1.4 has not reached the upper limit, determine whether the power increases. If the power does not increase, give a fault alarm. If the power increases, after running for a time t2, repeat step S44.

[0167] S442: Reduce the operating power of the waste heat recovery device 1.4. If the waste heat recovery device 1.4 has stopped, go to step S45; if the waste heat recovery device 1.4 has not stopped, determine whether the power decreases. If the power does not decrease, give a fault alarm. If the power decreases, after running for a time t2, repeat step S44.

[0168] S45: Determine whether the cleaning line has stopped. If it has stopped, close the waste heat heating module; if it has not stopped, after every time t5, repeat step S44.

[0169] In summary, the control module of this invention coordinates the control of the waste heat recovery heating module and the steam heating module through the cleaning line operation data. Based on steam heating, it recovers the waste heat from the flue gas generated during production for heating and maintaining the temperature of the cleaning fluid. This achieves comprehensive heating and temperature maintenance of various cleaning fluids in the cleaning line using steam and flue gas waste heat, reducing steam consumption when heating the cleaning fluid, saving energy procurement costs, improving energy utilization efficiency, and indirectly reducing carbon emissions. The system collects various operational data in real time, including flue gas temperature data, cleaning fluid temperature data in each cleaning tank, heat storage medium temperature data, flue gas flow data, heat storage medium flow data, heat storage medium capacity, and cleaning line operating status data, as system variables. Real-time judgment allows for comprehensive and precise control of the real-time progress of two heating methods based on various operational data, improving system stability and redundancy. The design, based on the temperature data of the cleaning fluid in each cleaning tank 6, enables the cleaning line to be compatible with cleaning fluids of different temperatures, compositions, and cleanliness requirements, simplifying equipment use and improving equipment compatibility with cleaning fluids. Furthermore, real-time monitoring and control of the cleaning fluid temperature in the cleaning tank 6 allows for the adjustment of corresponding valve openings and closings, achieving precise distribution of heat energy among different cleaning tanks 6. The connection between the waste heat recovery device 1.4, the flue gas emission device 1.5, and the heat energy storage device 1.6 enables unified emission and treatment of flue gas after waste heat recovery, reducing environmental problems caused by indiscriminate or leaky discharges.

[0170] Embodiments of this application may be provided as methods, systems, or computer program products. Therefore, this application may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0171] Embodiments of this application may be provided as methods, systems, or computer program products. Therefore, this application may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0172] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0173] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0174] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0175] The above description is only a preferred embodiment of the present invention. Without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A composite heating and insulation system, characterized in that, include: Waste heat recovery heating module, steam heating module, status monitoring module, heat circulation and auxiliary adjustment module, control module; The waste heat recovery heating module is used to supply the recovered waste heat of flue gas to the cleaning liquid in multiple cleaning tanks for flue gas heating based on the control instructions of the control module, and to discharge flue gas. The steam heating module is used to supply steam heat to the cleaning liquid in multiple cleaning tanks to heat the cleaning tanks based on the control instructions of the control module. The status monitoring module is used to send flue gas temperature data, cleaning fluid temperature data of each cleaning tank, heat storage medium temperature data, flue gas flow rate data, heat storage medium flow rate data, heat storage medium capacity, and cleaning line operation status data to the control module. The heat circulation and auxiliary adjustment module is installed on multiple pipelines of the waste heat recovery heating module and the steam heating module, and is used to send the flow data of the heat storage medium in the multiple pipelines and the opening data of multiple valve ports to the control module. The flow rate of the thermal storage medium and the opening of multiple valve ports are adjusted based on the control commands from the control module. The control module receives flue gas temperature data, cleaning fluid temperature data of each cleaning tank, heat storage medium temperature data, flue gas flow rate data, heat storage medium flow rate data, heat storage medium capacity, and cleaning line operating status data. It generates control commands to perform steam heating or waste heat heating on the cleaning line, controls each module under steam heating or waste heat heating and outputs fault information, and shuts down the steam heating mode or waste heat heating mode after determining that the cleaning line is shut down.

2. The composite heating and insulation system according to claim 1, characterized in that, The waste heat recovery heating module includes: a flue gas generating device; a flue gas three-way valve connected to the outlet of the flue gas generating device via a flue gas pipe; a flue gas diversion device connected to the first outlet of the flue gas three-way valve via a flue gas pipe; a waste heat recovery device connected to the outlet of the flue gas diversion device via a flue gas pipe; a heat energy storage device connected to the heat release port of the waste heat recovery device via a pipeline; a sequential heat exchange pipeline connected to the inlet and outlet of the heat energy storage device and having multiple parallel branches; waste heat exchange devices installed on the branches of the sequential heat exchange pipeline and installed in the cleaning tank; a replenishment tank connected to the inlet of the heat energy storage device via a pipeline; and a flue gas emission device connected at one end to the second outlet of the flue gas three-way valve and at the other end to the exhaust port of the waste heat recovery device, wherein the multiple parallel sequential heat exchange pipeline branches pass through the cleaning tank.

3. The composite heating and insulation system according to claim 1, characterized in that, The steam heating module includes: a steam heat transfer device fixedly installed in the cleaning tank; and a steam pipe connected to the steam heat transfer device via a pipeline.

4. The composite heating and insulation system according to claim 1, characterized in that, The status monitoring module includes: liquid temperature measuring devices installed in the thermal energy storage device and each cleaning tank; liquid level measuring device installed on the thermal energy storage device; multiple liquid flow measuring devices installed between the waste heat exchange device and the first automatic valve; and flue gas flow measuring devices and flue gas temperature measuring devices installed on the flue gas pipeline from the outlet of the flue gas generating device to the flue gas three-way valve. The liquid temperature measuring device is used to detect the temperature of the cleaning fluid and the heat storage medium, respectively. The liquid level measuring device is used to measure the capacity of the heat storage medium in the thermal energy storage device; The liquid flow measurement device is used to measure the flow rate of the heat storage medium flowing through the waste heat exchange device in the sequential heat exchange pipeline; The flue gas flow measurement device is used to measure the flow rate of flue gas discharged from the flue gas generating device; The flue gas temperature measuring device is used to measure the temperature of the flue gas discharged from the flue gas generating device.

5. The composite heating and insulation system according to claim 1, characterized in that, The heat circulation and auxiliary adjustment module includes: multiple first manual valves installed on the connecting pipelines between the waste heat recovery device and the heat energy storage device, the heat energy storage device and the waste heat exchange device, and the heat energy storage device and the replenishment tank; circulation pumps installed on the low-temperature connecting pipeline between the heat energy storage device and the waste heat recovery device, and on the high-temperature sequential heat exchange pipeline branch between the heat energy storage device and the waste heat exchange device; multiple first automatic valves installed on the sequential heat exchange pipeline branch; a safety valve connected in parallel between the heat energy storage device and the cleaning tank via the sequential heat exchange pipeline and the waste heat exchange device; a drain valve installed on the heat energy storage device; a replenishment pump installed on the pipeline between the heat energy storage device and the replenishment tank; and second manual valves and second automatic valves installed on the pipeline connecting the steam pipeline and the steam heat transfer device. The first manual valve is used to manually control the on / off state of the waste heat recovery device and the thermal energy storage device, as well as the flow rate of the heat storage medium. The circulating pump is used to provide power for the heat storage medium flowing between the waste heat recovery device and the thermal energy storage device; The number of the first automatic valves is equal to the number of sequential heat exchange pipeline branches and the number of cleaning tanks, and they are installed on the sequential heat exchange pipeline branches to control the flow rate through the waste heat exchange device. The safety valve is used to stabilize the pressure inside the sequential heat exchange pipeline; The discharge valve is used to control the total amount of heat storage medium in the thermal energy storage device; The replenishment pump is used to replenish the thermal energy storage medium for the thermal energy storage device; The second manual valve is used to manually control the on / off state of the steam pipeline and each steam heat transfer device, as well as the steam flow control of each steam heat transfer device; The second automatic valve is used to automatically control the steam flow rate to each steam heat transfer device.

6. A composite heating and insulation control method, based on the composite heating and insulation system of claim 1, characterized in that, include: Data on flue gas temperature, cleaning fluid temperature in each cleaning tank, heat storage medium temperature, flue gas flow rate, heat storage medium flow rate, heat storage medium capacity, and cleaning line operating status were collected separately. The waste heat content of the flue gas is calculated based on the flue gas temperature data and flue gas flow data, and the cleaning line is shut down based on the cleaning line operation status data. Based on the waste heat content of the flue gas, determine whether to start the steam heating mode or the waste heat heating mode; and turn off the steam heating mode or the waste heat heating mode after determining that the cleaning line is shut down. During the steam heating process, the opening size and running time of each second automatic valve are controlled based on the temperature data of the cleaning liquid in each cleaning tank. During the residual smoke heating process, based on the capacity of the heat storage medium, the temperature data of the cleaning liquid in each cleaning tank, the temperature data of the heat storage medium, and the flow rate data of the heat storage medium, the system controls the opening and closing of the replenishment pump, the opening and closing of the discharge valve, the linkage between the waste heat recovery device and the circulation pump, and the opening and closing of each first automatic valve, or adjusts the power of the waste heat recovery device and outputs fault information.

7. The composite heating and heat preservation control method according to claim 6, characterized in that, Based on the waste heat content of the flue gas, determine whether to activate the steam heating mode or the waste heat heating mode, including: Determine whether the waste heat content of the flue gas meets the lower limit of the usage requirements based on the preset waste heat content of the flue gas. If the minimum usage requirement is not met, activate the steam heating mode and open the second automatic valve. Once the minimum usage requirement is met, the waste heat heating mode is activated, and the flue gas three-way valve and flue gas diversion device are started.

8. The composite heating and heat preservation control method according to claim 6, characterized in that, During the steam heating process, the opening size and operating time of each second automatic valve are controlled based on the temperature data of the cleaning fluid in each cleaning tank, including: Based on the preset cleaning fluid temperature threshold, the cleaning fluid temperature data of each cleaning tank is judged. When the cleaning fluid temperature data of any cleaning tank is less than the lower limit of the preset cleaning fluid temperature threshold, the opening of the second automatic valve in the corresponding pipeline is increased until the preset running time is continued and the cleaning fluid temperature data of the cleaning tank is judged again. When the cleaning fluid temperature data of any cleaning tank exceeds the preset upper limit of the cleaning fluid temperature threshold, the opening of the second automatic valve in the corresponding pipeline is reduced until the preset running time is continued and the cleaning fluid temperature data of the cleaning tank is re-evaluated. When the temperature data of the cleaning fluid in any cleaning tank meets the preset temperature threshold range, the opening of the second automatic valve in the corresponding pipeline remains unchanged until the preset running time is reached, after which the temperature data of the cleaning fluid in the cleaning tank is re-evaluated.

9. The composite heating and heat preservation control method according to claim 6, characterized in that, During the residual smoke heating process, based on the capacity of the heat storage medium, the temperature data of the cleaning fluid in each cleaning tank, the temperature data of the heat storage medium, and the flow rate data of the heat storage medium, the system controls the opening and closing of the replenishment pump, the opening and closing of the discharge valve, the linkage between the waste heat recovery device and the circulating pump, and the opening and closing of each first automatic valve, or adjusts the power of the waste heat recovery device, and outputs fault information, including: The capacity of the heat storage medium is determined based on the preset capacity threshold of the heat storage medium, and the start of the replenishment pump, the start of the discharge valve, or the linkage between the waste heat recovery device and the circulation pump is controlled according to the determined capacity of the heat storage medium. Based on the preset cleaning fluid temperature threshold, the cleaning fluid temperature data of each cleaning tank is determined, the opening and closing of each first automatic valve is determined, and the heat storage medium flow data in the circulating heat exchange pipeline branch where each first automatic valve is located is monitored. Based on the heat storage medium flow data, fault information is output in real time. The temperature of the heat storage medium is determined based on a preset temperature threshold. The power of the waste heat recovery device is adjusted according to the determined temperature of the heat storage medium, and the adjusted power of the waste heat recovery device is monitored. Based on the power of the waste heat recovery device, fault information is output in real time.

10. The composite heating and heat preservation control method according to claim 9, characterized in that, The capacity of the thermal storage medium is determined based on a preset capacity threshold. The system then controls the start of the replenishment pump, the start of the discharge valve, or the linkage between the waste heat recovery device and the circulation pump based on the determined capacity. This includes: When the capacity of the thermal storage medium is less than the lower limit of the preset capacity threshold of the thermal storage medium, the replenishment pump is turned on to replenish the thermal energy storage device; and when the capacity of the thermal storage medium is equal to the average value of the preset capacity threshold of the thermal storage medium, the replenishment pump is turned off. When the capacity of the heat storage medium is greater than the upper limit of the preset capacity threshold of the heat storage medium, the drain valve is opened to drain the heat storage device, and the drain valve is closed when the capacity of the heat storage medium is equal to the average value of the preset capacity threshold of the heat storage medium. When the capacity of the heat storage medium is greater than or equal to the lower limit of the preset capacity threshold and less than or equal to the upper limit of the capacity threshold, the waste heat recovery device and the circulation pump are turned on, and each of the first automatic valves is adjusted to the preset opening and continues to run for the preset time.

11. The composite heating and heat preservation control method according to claim 9, characterized in that, Based on a preset cleaning fluid temperature threshold, the temperature data of the cleaning fluid in each cleaning tank is determined to determine the opening and closing of each first automatic valve. The flow rate data of the heat storage medium in the circulating heat exchange pipeline branch where each first automatic valve is located is monitored. Based on the heat storage medium flow rate data, fault information is output in real time, including: If the temperature of the cleaning fluid in any cleaning tank is detected to be lower than the lower limit of the preset cleaning fluid temperature threshold, the opening area of ​​the first automatic valve located in the cleaning tank is increased. During the process of increasing the opening of the first automatic valve, based on the preset opening threshold and system settings, it is determined to close the first automatic valve corresponding to a portion of the cleaning tanks and switch to steam heating mode or output fault information based on the heat storage medium flow data. If the valve opening of the first automatic valve has reached the upper limit, the first automatic valve corresponding to a portion of the cleaning tanks is closed according to the settings and the system switches to steam heating mode. If the valve opening of the first automatic valve does not reach the upper limit, the flow rate of the corresponding pipeline is detected and judged based on the flow rate data of the heat storage medium. If the flow rate does not increase, a fault message is output. If the flow rate increases, the preset running time is maintained and the temperature of the cleaning fluid is re-judged. If the temperature data of the cleaning fluid in any cleaning tank is detected to be greater than the upper limit of the preset cleaning fluid temperature threshold, the opening area of ​​the first automatic valve located in the cleaning tank is reduced, and fault information is output based on the heat storage medium flow data during the process of reducing the opening of the first automatic valve; and after the opening of the first automatic valve is reduced to closed and maintained for a preset time, the temperature of the heat storage medium is determined.

12. The composite heating and heat preservation control method according to claim 9, characterized in that, The temperature of the heat storage medium is determined based on a preset temperature threshold. The power of the waste heat recovery device is adjusted according to the determined temperature, and the adjusted power is monitored. Based on the power of the waste heat recovery device, fault information is output in real time, including: If the temperature of the heat storage medium is lower than the preset lower limit of the heat storage medium temperature threshold, the operating power of the waste heat recovery device will be increased; and fault information will be output based on the real-time power status; if the power is increased to the upper limit, an automatic alarm will be triggered and the system will prompt manual intervention to adjust the operation of the entire heating system. If the power increase does not reach the upper limit, the power is judged in real time. If the power increases, the temperature of the heat storage medium is re-judged after the preset running time. If the power does not increase, a fault information is output. If the temperature of the heat storage medium is greater than the upper limit of the preset heat storage medium temperature threshold, the operating power of the waste heat recovery device is reduced, and fault information is output based on the real-time power status. If the waste heat recovery device is reduced to shutdown, it is determined whether the cleaning line is shut down. If the waste heat recovery device is not shut down, the power is judged in real time. If the power is reduced, the preset operating time is maintained and the heat storage medium temperature is re-judged. If the power is not reduced, fault information is output.

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